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PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [April 9, 



F. Brownish sands, micaceous in parts, and passing down- 



wards into brown marls and ferruginous clay. Thickness 

 not ascertained. 



G. Upper Lias Clay, darkish blue. 



Fossils of the Pea-grit and other Limestone-heds of the Inferior 



Oolite — A, B, c. 



The beds a and b contain many fossils, which in general are not 

 well preserved. The Echinodermata are sometimes found tolerably 

 perfect with the test in a good state of preservation. The Mollusca 

 are usually denuded of the shell ; but when they happen to be pre- 

 served in clayey or sandy seams of the Pea-grit, the sculpture of the 

 shell is sharp and perfect. The following list contains only the most 

 prevailing species : — 



Cephalopoda. 



Ammonites corrugatus. Sow. Juvenile state of A. MurchisoncB, Sow. Min. 



Conch, pi. 451.%. 3. 

 Nautilus truncatus. Sow. Belemnites giganteus, Schloth. 



Gasteropoda. 



Pleurotomaria ornata, Defrance. Cirrus nodosus. Sow. 



Patella rugosa. Sow. 

 inornata, Lycett. 



Nerita costata, Sow. 

 Natica adducta, Phil. 



Trochotoma carinata. Lye. 

 Chemnitzia, nov. sp. 

 Rimula tricarinata. Sow. 

 Nerinsea, nov. sp. 



Conchifera. 



Lima duplicata. Sow. 



notata. Gold/. 



semicircularis, Goldf. 



leeviuscula, Goldf. (non Sow.), 



— — sulcata, Miinster. 



lyrata, Miinster . 



ovahs, Sow. 



Lima, nov. sp., allied to L. punctata. 

 Pecten, nov. sp. (non vimineus). 

 Pecten lens, Sow. 



demissus ?, Phil. 



clathratus, Rcsmer. 



Goniomya angulifera. Sow. 

 Hinnites abjectus, Phil. 



■ ■ tuberculosus, Goldf. 



, nov. sp. 



Plicatula, sp. 



Placuna Jurensis, Roemer. 



Mytilus bipartita. Sow. 



pectinatus. Sow. 



pulcher. Sow. 



striatulus, Miinst. 



cuneatus. Sow. 



Modiola plicata, Sow. 

 Pinna cuneata. Sow. 



Pinna fissa ?, Goldf. 

 Myoconcha crassa. Sow. 

 Ostrea costata. Sow. 

 Avicula ? complicata. Buck. 

 Cypricardia cordiformis. Desk, 

 Lucina despecta, Phil. 

 Psammobia laevigata, Phil. 

 Ceromya plicata, Agass. 



Bajociana, d'Orbig. 



Macrodon Hirsonensis, d'Archiac. 

 Myacites punctata. Buck. 



dilatata. Buck. 



oblonga. Buck. 



Trichites, sp. 



Cardium striatulum, Phil. 



laevigatum, Lycett. 



Trigonia costatula, Lycett. 



exigua, Lycett. 



V- costata, Lycett. 



decorata*, Lycett. 



clavo-costata*, Lycett. 



costata. Sow. 



striata. Sow. 



duplicata*, Sow;. 



Avicula echinata. Sow. 



* Those marked with an asterisk occur in the upper ragstones only. 



